Simultaneous voice and data transmission in private mobile radio using a narrowband fm channel
1988 ◽
Vol 135
(5)
◽
pp. 439
1978 ◽
Vol 27
(3)
◽
pp. 77-85
◽
2003 ◽
pp. 238-246
1984 ◽
Vol 131
(7)
◽
pp. 767